alcohol dehydrogenase aldehyde reductase ADH alcohol dehydrogenase (NAD) aliphatic alcohol dehydrogenase ethanol dehydrogenase NAD-dependent alcohol dehydrogenase NAD-specific aromatic alcohol dehydrogenase NADH-alcohol dehydrogenase NADH-aldehyde dehydrogenase primary alcohol dehydrogenase yeast alcohol dehydrogenase